ErrorCodeDoctor
Daikin Air Conditioner J2 error code
The J2 error means your Daikin air conditioner detected a fault with the compressor current sensor. This can be caused by a defective current sensor, a defective compressor, or a defective outdoor unit PCB. Contact a qualified technician.
Common causes
- Defective current sensor
- Defective compressor
- Defective outdoor unit PCB
How to fix it
-
1
Contact a qualified technician to inspect the compressor current sensor
Related Daikin Air Conditioner error codes
A0
An external protection device connected to the indoor unit has been activated
A1
A fault was detected in the indoor unit PCB (control board)
A3
The drain level control system has detected an abnormality — drain may be clogged
A5
Freeze-up protection (cooling) or high pressure control (heating) has activated — check the air filter
J2 error — frequently asked questions
What does the J2 error mean on a Daikin air conditioner?
The compressor current sensor has a fault
What causes the J2 error?
The J2 error is usually caused by: Defective current sensor; Defective compressor; Defective outdoor unit PCB.
Can I fix the J2 error myself?
This is rated a hard fix — it often requires tools, parts, or experience, and may be safer left to a professional technician.
How much does it cost to fix the J2 error?
Fixing the J2 error on a Daikin air conditioner typically costs $80–$300, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my air conditioner with the J2 error?
We'd recommend addressing the J2 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.